2004 BMW Z4 3.0

2004 BMW Z4 3.0

Author
Discussion

C70R

8,162 posts

70 months

Wednesday 11th March 2020
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Big fan of the car, and your willingness to get grubby. I've come close to picking one of these up a few times, but ended up plumping for a Mini instead.

Can you share a link for the windscreen chip kit you used? I have a very annoying one that isn't quite an MOT failure, and I quite like the idea of spending a couple of quid on an 'ok' fix.

Jakg

Original Poster:

2,699 posts

134 months

Wednesday 11th March 2020
quotequote all
C70R said:
Can you share a link for the windscreen chip kit you used? I have a very annoying one that isn't quite an MOT failure, and I quite like the idea of spending a couple of quid on an 'ok' fix.
https://www.ebay.co.uk/itm/DIY-Premium-Car-Windscreen-Repair-Kit-Crack-Chip-Windshield-Glass-Window-Screen/153688776924

The recommendation I saw on Facebook was from someone who bought the same kit in Asda for about a fiver if you prefer to shop local.

Sycamore

711 posts

84 months

Wednesday 11th March 2020
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Could you shine some light on the cable you use to connect the car to INPA?

I have the full set of software and the DCables cable I have connects and I can read live data from the car, however as soon as I try dig any deeper, read fault codes etc it says it can't connect to the car. Assuming it's a fault with the cable itself.

I have the same car, same colour, same engine, so I'm hoping that's the case. Or I am thick, which is a real possibility.

C70R

8,162 posts

70 months

Wednesday 11th March 2020
quotequote all
Thank you.

Jakg

Original Poster:

2,699 posts

134 months

Wednesday 11th March 2020
quotequote all
Sycamore said:
Could you shine some light on the cable you use to connect the car to INPA?

I have the full set of software and the DCables cable I have connects and I can read live data from the car, however as soon as I try dig any deeper, read fault codes etc it says it can't connect to the car. Assuming it's a fault with the cable itself.

I have the same car, same colour, same engine, so I'm hoping that's the case. Or I am thick, which is a real possibility.
https://www.ebay.co.uk/itm/312801859524

The switch swaps two pins and that is the key I think - I had a similar unit before where I added the switch myself and after that it worked on my MG ZT & the Z4. This is probably why yours isn't working?

Plus you need the right version of the software (I think the version included is ok), and to ensure that the COM ports are configured correctly (i.e. that the interface software is pointing at the COM port associated with the cable).

Jakg

Original Poster:

2,699 posts

134 months

Tuesday 27th October 2020
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The boot continues to be bigger than expected.

Work bag, swimming bag and an entire office chair - albeit completely dismantled.



And an arty profile shot


Jakg

Original Poster:

2,699 posts

134 months

Friday 22nd January
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Was driving along a while ago and the battery light came on and lost power steering.

Thought it was just lack of use, so took it out later and it was fine.
Stopped on the way back to make a phone call and noticed the roof wouldn't go up. And then the power steering stopped working again.
Very luckily I wasn't far from home, started to run poorly before eventually conking out on the drive.
Although it was on the drive, unfortunately it was blocking my other car - and had the roof down - so I tried jumping it and it started fine.



With the engine running, the problem is obvious



Airbox out



Alternator off





I thought it'd be a straight replacement, but it was a bit more expensive than I was expecting - the fitment is unique to the Z4, but I suspect any M54 one would fit - even then it was £130 for the cheapest recon unit.
I took a chance and replaced just the voltage regulator for £30.



And sucess



Unfortunately, while poking around I found a suspicious coolant puddle on the undertray



First thought was the expansion tank, so I pulled that out to find out it'd already been replaced in 2015 (that was in the service history, ooops).

I noticed the seals on the expansion tank cap were looking a bit worn out, but that wouldn't explain that much coolant.



Some more poking around and I spotted a little bit of coolant around the temperature sensor



Pulled it out and it looks fine



Having looked online they never leak... unless they've been in there a while, then if they are ever removed they never seal again.
I removed it when doing the VANOS seals so fair enough.

The O-Ring isn't a separate part, and all the measurements I could fine online were imperial, so I got a new one for £15.

I originally thought the leak was from the thermostat above, but although I'd realised it wasn't, I got a brand new Wahler one on eBay for £15 so I thought I'd change it anyway.
The bolts were really rusty, and there was coolant stains around the outside of the gasket so I think it has been leaking for a while, although probably not badly. And obviously new bolts too.



Baby monitor makes nap time, car time



Put it all back together, trying to bleed the system and the stupid plastic bleed screw rounded



I get why it's plastic, and i'm probably guilty of overtightening it slightly, but I think the real problem is that I don't know what tool is best to use on it.
It's a cross head, but no depth so you can't use a crosshead screwdriver.
And if you use a flat head it needs to be really wide but also thin to fit in the grooves without putting the torque in the weak centre.

I borrowed the one of my 335d to bleed it and then replaced both cars with brass ones



I've bled the system before but this time I wasn't happy with the heat coming out of the vents, it was probably the scare stories of the M54 being difficult to bleed.
One suggestion was to raise the front - I couldn't be bothered to jack it up so found a nearby incline instead.



I think the drive probably did the job though as it was fine when I got there!

I worked out how many miles it's done this year and i'm genuinely embarrassed… need to drive it more, pandemic dependant.

helix402

6,262 posts

148 months

Friday 22nd January
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Best tool for undoing the bleed screw is a 2p. The radiator outlet temp sensor o ring is a common leak point on all M54s and is available from a few suppliers as an uprated version.

Edited by helix402 on Friday 22 January 23:55


Edited by helix402 on Saturday 23 January 14:31

Sticks.

6,813 posts

217 months

Saturday 23rd January
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Good write up thanks.

I had the sensor replaced last year as it was leaking. The hose connection has leaked previously.

greggy50

5,285 posts

157 months

Saturday 23rd January
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Good thread, I was the owner of the Z4 linked in the OP and regret selling it when I did as prices appear to have risen a fair bit recently looking at ones for sale currently...

I may look at getting a Z4 3.0 SI later in the year if I can find one decent for under £7k

LosingGrip

6,126 posts

125 months

Saturday 23rd January
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I’m half tempted by one, although the one I’ve looked at is auto.

What are they like for tall people? I’m 6ft 4 and not sure if I’ll be able to drive it comfortably.

helix402

6,262 posts

148 months

Saturday 23rd January
quotequote all
LosingGrip said:
I’m half tempted by one, although the one I’ve looked at is auto.

What are they like for tall people? I’m 6ft 4 and not sure if I’ll be able to drive it comfortably.
You’ll fit.

d_a_n1979

2,932 posts

38 months

Saturday 23rd January
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helix402 said:
LosingGrip said:
I’m half tempted by one, although the one I’ve looked at is auto.

What are they like for tall people? I’m 6ft 4 and not sure if I’ll be able to drive it comfortably.
You’ll fit.
Depends on your build.

I can't fit in one at all, but I'm 6ft 4 and 22 stone.

Even a lot lighter at 18stone I couldn't fit in one comfortable enough to drive more than a spirited drive...

LosingGrip

6,126 posts

125 months

Saturday 23rd January
quotequote all
d_a_n1979 said:
Depends on your build.

I can't fit in one at all, but I'm 6ft 4 and 22 stone.

Even a lot lighter at 18stone I couldn't fit in one comfortable enough to drive more than a spirited drive...
Ah I’m the same weight give or take. Will see if I’m allowed to test drive one with COVID etc.


d_a_n1979

2,932 posts

38 months

Saturday 23rd January
quotequote all
LosingGrip said:
d_a_n1979 said:
Depends on your build.

I can't fit in one at all, but I'm 6ft 4 and 22 stone.

Even a lot lighter at 18stone I couldn't fit in one comfortable enough to drive more than a spirited drive...
Ah I’m the same weight give or take. Will see if I’m allowed to test drive one with COVID etc.
The issue for me is my width of my back, shoulders, arse and legs laugh

I'm a competitive powerlifter and stone lifter, so it's my build that makes it awkward for me unfortunately...

LosingGrip

6,126 posts

125 months

Saturday 23rd January
quotequote all
d_a_n1979 said:
The issue for me is my width of my back, shoulders, arse and legs laugh

I'm a competitive powerlifter and stone lifter, so it's my build that makes it awkward for me unfortunately...
I wish I had that excuse...I’m just fat.

Sticks.

6,813 posts

217 months

Saturday 23rd January
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i remember reading on the Z4 Forum many years ago that some people found the sports seats too narrow. SE seats might be better, absolutely no support at all.

beambeam1

316 posts

9 months

Saturday 23rd January
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Sports seats were hellish but I managed Edinburgh to the Nurburgring for 8 laps and back 10 years ago and I was 6ft 2" and 22 stone then. I'm broad as well as a bit husky but it was the legs that killed me, had to replace the door handle trims as my knees rubbed off them the whole trip.

thecremeegg

1,602 posts

169 months

Sunday 24th January
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LosingGrip said:
I’m half tempted by one, although the one I’ve looked at is auto.

What are they like for tall people? I’m 6ft 4 and not sure if I’ll be able to drive it comfortably.
I'm 6'5 and I fit, albeit it can get a bit uncomfy for longer journeys. If you're anywhere near Surrey/Hants border you're welcome to try mine (once I sort the squeaky steering!)

TotalControl

7,817 posts

164 months

Monday 25th January
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Love the colour to this. Must be quite rare as I've never seen one in that shade before.

On my bucket list to own at one point. They seem to be looking better with age. Also happy to see that most jobs can, with patience, be tackled yourself.